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dc.contributor.author
Ghosalya, Manoj K.
dc.contributor.author
Li, Xiansheng
dc.contributor.author
Beck, Arik
dc.contributor.author
van Bokhoven, Jeroen A.
dc.contributor.author
Artiglia, Luca
dc.date.accessioned
2021-06-23T16:29:36Z
dc.date.available
2021-06-23T03:10:20Z
dc.date.available
2021-06-23T16:29:36Z
dc.date.issued
2021-05-06
dc.identifier.issn
1932-7455
dc.identifier.issn
1932-7447
dc.identifier.other
10.1021/acs.jpcc.1c01718
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/490798
dc.description.abstract
Understanding the surface chemistry of ceria nanoparticles in a water environment is of fundamental interest for several research fields and notably in catalysis and biology/biochemistry. Particularly, regarding pro- and antioxidant activity, the size of the ceria nanoparticle plays a critical role. Large ceria particles (>5 nm) usually cause oxidative distress, resulting in the formation of reactive oxygen species, whereas small particles (<5 nm) act as reactive oxygen scavengers. It is generally believed that the activity depends on the Ce3+/Ce4+ ratio. However, biological reactions typically happen in aqueous media at room temperature, so other hypotheses were considered, in particular the degree of surface hydroxylation. By means of ambient pressure X-ray phototelectron spectroscopy, we demonstrate that Ce4+ does not reduce up to 300 °C. The surface concentration and thermal stability of hydroxyl groups correlate with the size of ceria nanoparticles. In particular, small ceria nanoparticles (<5 nm diameter) show a higher hydroxyl group density than larger ones. Finally, hydroxyl groups are thermally more stable on small ceria particles compared to large ones.
en_US
dc.language.iso
en
en_US
dc.publisher
American Chemical Society
en_US
dc.title
Size of Ceria Particles Influences Surface Hydroxylation and Hydroxyl Stability
en_US
dc.type
Journal Article
dc.date.published
2021-04-22
ethz.journal.title
The Journal of Physical Chemistry C
ethz.journal.volume
125
en_US
ethz.journal.issue
17
en_US
ethz.journal.abbreviated
J. Phys. Chem. C
ethz.pages.start
9303
en_US
ethz.pages.end
9309
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Washington, DC
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02020 - Dep. Chemie und Angewandte Biowiss. / Dep. of Chemistry and Applied Biosc.::02516 - Inst. f. Chemie- und Bioingenieurwiss. / Inst. Chemical and Bioengineering::03746 - Van Bokhoven, Jeroen A. / Van Bokhoven, Jeroen A.
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02020 - Dep. Chemie und Angewandte Biowiss. / Dep. of Chemistry and Applied Biosc.::02516 - Inst. f. Chemie- und Bioingenieurwiss. / Inst. Chemical and Bioengineering::03746 - Van Bokhoven, Jeroen A. / Van Bokhoven, Jeroen A.
ethz.date.deposited
2021-06-23T03:10:24Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2021-06-23T16:29:50Z
ethz.rosetta.lastUpdated
2023-02-06T22:09:27Z
ethz.rosetta.versionExported
true
ethz.COinS
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